Comparative study on stress distribution around internal tapered connection implants according to fit of cement- and screw-retained prostheses
Identifieur interne : 002E86 ( Pmc/Curation ); précédent : 002E85; suivant : 002E87Comparative study on stress distribution around internal tapered connection implants according to fit of cement- and screw-retained prostheses
Auteurs : Mi-Young Lee [Corée du Sud] ; Seong-Joo Heo [Corée du Sud] ; Eun-Jin Park [Corée du Sud] ; Ji-Man Park [Corée du Sud]Source :
- The Journal of Advanced Prosthodontics [ 2005-7806 ] ; 2013.
Abstract
The aim of this study was to compare the passivity of implant superstructures by assessing the strain development around the internal tapered connection implants with strain gauges.
A polyurethane resin block in which two implants were embedded served as a measurement model. Two groups of implant restorations utilized cement-retained design and internal surface of the first group was adjusted until premature contact between the restoration and the abutment completely disappeared. In the second group, only nodules detectable to the naked eye were removed. The third group employed screw-retained design and specimens were generated by computer-aided design/computer-aided manufacturing system (n=10). Four strain gauges were fixed on the measurement model mesially and distally to the implants. The strains developed in each strain gauge were recorded during fixation of specimens. To compare the difference among groups, repeated measures 2-factor analysis was performed at a level of significance of α=.05.
The absolute strain values were measured to analyze the magnitude of strain. The mean absolute strain value ranged from 29.53 to 412.94 µm/m at the different strain gauge locations. According to the result of overall comparison, the cement-retained prosthesis groups exhibited significant difference. No significant difference was detected between milled screw-retained prostheses group and cement-retained prosthesis groups.
Within the limitations of the study, it was concluded that the cement-retained designs do not always exhibit lower levels of stress than screw-retained designs. The internal adjustment of a cement-retained implant restoration is essential to achieve passive fit.
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DOI: 10.4047/jap.2013.5.3.312
PubMed: 24049573
PubMed Central: 3774946
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<record><TEI><teiHeader><fileDesc><titleStmt><title xml:lang="en">Comparative study on stress distribution around internal tapered connection implants according to fit of cement- and screw-retained prostheses</title><author><name sortKey="Lee, Mi Young" sort="Lee, Mi Young" uniqKey="Lee M" first="Mi-Young" last="Lee">Mi-Young Lee</name><affiliation wicri:level="1"><nlm:aff id="A1">Department of Prosthodontics, School of Medicine, Ewha Womans University, Seoul, Republic of Korea.</nlm:aff><country xml:lang="fr" wicri:curation="lc">Corée du Sud</country><wicri:regionArea>Department of Prosthodontics, School of Medicine, Ewha Womans University, Seoul</wicri:regionArea></affiliation></author><author><name sortKey="Heo, Seong Joo" sort="Heo, Seong Joo" uniqKey="Heo S" first="Seong-Joo" last="Heo">Seong-Joo Heo</name><affiliation wicri:level="1"><nlm:aff id="A2">Department of Prosthodontics, School of Dentistry, Seoul National University, Seoul, Republic of Korea.</nlm:aff><country xml:lang="fr" wicri:curation="lc">Corée du Sud</country><wicri:regionArea>Department of Prosthodontics, School of Dentistry, Seoul National University, Seoul</wicri:regionArea></affiliation></author><author><name sortKey="Park, Eun Jin" sort="Park, Eun Jin" uniqKey="Park E" first="Eun-Jin" last="Park">Eun-Jin Park</name><affiliation wicri:level="1"><nlm:aff id="A1">Department of Prosthodontics, School of Medicine, Ewha Womans University, Seoul, Republic of Korea.</nlm:aff><country xml:lang="fr" wicri:curation="lc">Corée du Sud</country><wicri:regionArea>Department of Prosthodontics, School of Medicine, Ewha Womans University, Seoul</wicri:regionArea></affiliation></author><author><name sortKey="Park, Ji Man" sort="Park, Ji Man" uniqKey="Park J" first="Ji-Man" last="Park">Ji-Man Park</name><affiliation wicri:level="1"><nlm:aff id="A1">Department of Prosthodontics, School of Medicine, Ewha Womans University, Seoul, Republic of Korea.</nlm:aff><country xml:lang="fr" wicri:curation="lc">Corée du Sud</country><wicri:regionArea>Department of Prosthodontics, School of Medicine, Ewha Womans University, Seoul</wicri:regionArea></affiliation></author></titleStmt><publicationStmt><idno type="wicri:source">PMC</idno><idno type="pmid">24049573</idno><idno type="pmc">3774946</idno><idno type="url">http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3774946</idno><idno type="RBID">PMC:3774946</idno><idno type="doi">10.4047/jap.2013.5.3.312</idno><date when="2013">2013</date><idno type="wicri:Area/Pmc/Corpus">002E86</idno><idno type="wicri:explorRef" wicri:stream="Pmc" wicri:step="Corpus" wicri:corpus="PMC">002E86</idno><idno type="wicri:Area/Pmc/Curation">002E86</idno><idno type="wicri:explorRef" wicri:stream="Pmc" wicri:step="Curation">002E86</idno></publicationStmt><sourceDesc><biblStruct><analytic><title xml:lang="en" level="a" type="main">Comparative study on stress distribution around internal tapered connection implants according to fit of cement- and screw-retained prostheses</title><author><name sortKey="Lee, Mi Young" sort="Lee, Mi Young" uniqKey="Lee M" first="Mi-Young" last="Lee">Mi-Young Lee</name><affiliation wicri:level="1"><nlm:aff id="A1">Department of Prosthodontics, School of Medicine, Ewha Womans University, Seoul, Republic of Korea.</nlm:aff><country xml:lang="fr" wicri:curation="lc">Corée du Sud</country><wicri:regionArea>Department of Prosthodontics, School of Medicine, Ewha Womans University, Seoul</wicri:regionArea></affiliation></author><author><name sortKey="Heo, Seong Joo" sort="Heo, Seong Joo" uniqKey="Heo S" first="Seong-Joo" last="Heo">Seong-Joo Heo</name><affiliation wicri:level="1"><nlm:aff id="A2">Department of Prosthodontics, School of Dentistry, Seoul National University, Seoul, Republic of Korea.</nlm:aff><country xml:lang="fr" wicri:curation="lc">Corée du Sud</country><wicri:regionArea>Department of Prosthodontics, School of Dentistry, Seoul National University, Seoul</wicri:regionArea></affiliation></author><author><name sortKey="Park, Eun Jin" sort="Park, Eun Jin" uniqKey="Park E" first="Eun-Jin" last="Park">Eun-Jin Park</name><affiliation wicri:level="1"><nlm:aff id="A1">Department of Prosthodontics, School of Medicine, Ewha Womans University, Seoul, Republic of Korea.</nlm:aff><country xml:lang="fr" wicri:curation="lc">Corée du Sud</country><wicri:regionArea>Department of Prosthodontics, School of Medicine, Ewha Womans University, Seoul</wicri:regionArea></affiliation></author><author><name sortKey="Park, Ji Man" sort="Park, Ji Man" uniqKey="Park J" first="Ji-Man" last="Park">Ji-Man Park</name><affiliation wicri:level="1"><nlm:aff id="A1">Department of Prosthodontics, School of Medicine, Ewha Womans University, Seoul, Republic of Korea.</nlm:aff><country xml:lang="fr" wicri:curation="lc">Corée du Sud</country><wicri:regionArea>Department of Prosthodontics, School of Medicine, Ewha Womans University, Seoul</wicri:regionArea></affiliation></author></analytic><series><title level="j">The Journal of Advanced Prosthodontics</title><idno type="ISSN">2005-7806</idno><idno type="eISSN">2005-7814</idno><imprint><date when="2013">2013</date></imprint></series></biblStruct></sourceDesc></fileDesc><profileDesc><textClass></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en"><sec><title>PURPOSE</title><p>The aim of this study was to compare the passivity of implant superstructures by assessing the strain development around the internal tapered connection implants with strain gauges.</p></sec><sec><title>MATERIALS AND METHODS</title><p>A polyurethane resin block in which two implants were embedded served as a measurement model. Two groups of implant restorations utilized cement-retained design and internal surface of the first group was adjusted until premature contact between the restoration and the abutment completely disappeared. In the second group, only nodules detectable to the naked eye were removed. The third group employed screw-retained design and specimens were generated by computer-aided design/computer-aided manufacturing system (n=10). Four strain gauges were fixed on the measurement model mesially and distally to the implants. The strains developed in each strain gauge were recorded during fixation of specimens. To compare the difference among groups, repeated measures 2-factor analysis was performed at a level of significance of α=.05.</p></sec><sec><title>RESULTS</title><p>The absolute strain values were measured to analyze the magnitude of strain. The mean absolute strain value ranged from 29.53 to 412.94 µm/m at the different strain gauge locations. According to the result of overall comparison, the cement-retained prosthesis groups exhibited significant difference. No significant difference was detected between milled screw-retained prostheses group and cement-retained prosthesis groups.</p></sec><sec><title>CONCLUSION</title><p>Within the limitations of the study, it was concluded that the cement-retained designs do not always exhibit lower levels of stress than screw-retained designs. 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<front><journal-meta><journal-id journal-id-type="nlm-ta">J Adv Prosthodont</journal-id><journal-id journal-id-type="iso-abbrev">J Adv Prosthodont</journal-id><journal-id journal-id-type="publisher-id">JAP</journal-id><journal-title-group><journal-title>The Journal of Advanced Prosthodontics</journal-title></journal-title-group><issn pub-type="ppub">2005-7806</issn><issn pub-type="epub">2005-7814</issn><publisher><publisher-name>The Korean Academy of Prosthodontics</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="pmid">24049573</article-id><article-id pub-id-type="pmc">3774946</article-id><article-id pub-id-type="doi">10.4047/jap.2013.5.3.312</article-id><article-categories><subj-group subj-group-type="heading"><subject>Original Article</subject></subj-group></article-categories><title-group><article-title>Comparative study on stress distribution around internal tapered connection implants according to fit of cement- and screw-retained prostheses</article-title></title-group><contrib-group><contrib contrib-type="author"><name><surname>Lee</surname><given-names>Mi-Young</given-names></name><degrees>DDS</degrees><degrees>MSD</degrees><xref ref-type="aff" rid="A1">1</xref></contrib><contrib contrib-type="author"><name><surname>Heo</surname><given-names>Seong-Joo</given-names></name><degrees>DDS</degrees><degrees>MSD</degrees><degrees>PhD</degrees><xref ref-type="aff" rid="A2">2</xref></contrib><contrib contrib-type="author"><name><surname>Park</surname><given-names>Eun-Jin</given-names></name><degrees>DDS</degrees><degrees>MMSc</degrees><degrees>PhD</degrees><xref ref-type="aff" rid="A1">1</xref></contrib><contrib contrib-type="author" corresp="yes"><name><surname>Park</surname><given-names>Ji-Man</given-names></name><degrees>DDS</degrees><degrees>MSD</degrees><degrees>PhD</degrees><xref ref-type="aff" rid="A1">1</xref></contrib></contrib-group><aff id="A1"><label>1</label>Department of Prosthodontics, School of Medicine, Ewha Womans University, Seoul, Republic of Korea.</aff><aff id="A2"><label>2</label>Department of Prosthodontics, School of Dentistry, Seoul National University, Seoul, Republic of Korea.</aff><author-notes><corresp>Corresponding author: Ji-Man Park. Department of Prosthodontics, School of Medicine, Ewha Womans University, 911-1 Mok-dong, Yangcheon-gu, Seoul, 158-710, Republic of Korea. Tel. 82226505631: <email>jimarn@ewha.ac.kr</email></corresp></author-notes><pub-date pub-type="ppub"><month>8</month><year>2013</year></pub-date><pub-date pub-type="epub"><day>31</day><month>8</month><year>2013</year></pub-date><volume>5</volume><issue>3</issue><fpage>312</fpage><lpage>318</lpage><history><date date-type="received"><day>19</day><month>4</month><year>2013</year></date><date date-type="rev-recd"><day>13</day><month>8</month><year>2013</year></date><date date-type="accepted"><day>16</day><month>8</month><year>2013</year></date></history><permissions><copyright-statement>© 2013 The Korean Academy of Prosthodontics</copyright-statement><copyright-year>2013</copyright-year><license license-type="open-access" xlink:href="http://creativecommons.org/licenses/by-nc/3.0/"><license-p>This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (<ext-link ext-link-type="uri" xlink:href="http://creativecommons.org/licenses/by-nc/3.0/">http://creativecommons.org/licenses/by-nc/3.0/</ext-link>) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.</license-p></license></permissions><abstract><sec><title>PURPOSE</title><p>The aim of this study was to compare the passivity of implant superstructures by assessing the strain development around the internal tapered connection implants with strain gauges.</p></sec><sec><title>MATERIALS AND METHODS</title><p>A polyurethane resin block in which two implants were embedded served as a measurement model. Two groups of implant restorations utilized cement-retained design and internal surface of the first group was adjusted until premature contact between the restoration and the abutment completely disappeared. In the second group, only nodules detectable to the naked eye were removed. The third group employed screw-retained design and specimens were generated by computer-aided design/computer-aided manufacturing system (n=10). Four strain gauges were fixed on the measurement model mesially and distally to the implants. The strains developed in each strain gauge were recorded during fixation of specimens. To compare the difference among groups, repeated measures 2-factor analysis was performed at a level of significance of α=.05.</p></sec><sec><title>RESULTS</title><p>The absolute strain values were measured to analyze the magnitude of strain. The mean absolute strain value ranged from 29.53 to 412.94 µm/m at the different strain gauge locations. According to the result of overall comparison, the cement-retained prosthesis groups exhibited significant difference. No significant difference was detected between milled screw-retained prostheses group and cement-retained prosthesis groups.</p></sec><sec><title>CONCLUSION</title><p>Within the limitations of the study, it was concluded that the cement-retained designs do not always exhibit lower levels of stress than screw-retained designs. The internal adjustment of a cement-retained implant restoration is essential to achieve passive fit.</p></sec></abstract><kwd-group><kwd>Implant prosthesis</kwd><kwd>Cement retention</kwd><kwd>Screw retention</kwd><kwd>Cement space</kwd><kwd>Passive fit</kwd><kwd>Strain gauge</kwd></kwd-group></article-meta></front><floats-group><fig id="F1" orientation="portrait" position="float"><label>Fig. 1</label><caption><p>Measurement model with implant A and B. A polyurethane resin block served as alveolar bone and two implants were placed with an inter-implant distance of 15 mm.</p></caption><graphic xlink:href="jap-5-312-g001"></graphic></fig><fig id="F2" orientation="portrait" position="float"><label>Fig. 2</label><caption><p>The design for implant superstructure of cement-retained groups (A and B) and screw-retained group (C and D). The upper plane was designed as flat and parallel to the horizontal surface of the resin block.</p></caption><graphic xlink:href="jap-5-312-g002"></graphic></fig><fig id="F3" orientation="portrait" position="float"><label>Fig. 3</label><caption><p>The measurement model with strain gauges. Four strain gauges (SG1, SG2, SG3, SG4) were attached with the sensing elements oriented in the mesial-distal direction adjacent to implant A and B.</p></caption><graphic xlink:href="jap-5-312-g003"></graphic></fig><fig id="F4" orientation="portrait" position="float"><label>Fig. 4</label><caption><p>Boxplot showing the strain values at each strain gauge location. The Group C<sub>non</sub> showed the highest value.</p></caption><graphic xlink:href="jap-5-312-g004"></graphic></fig><fig id="F5" orientation="portrait" position="float"><label>Fig. 5</label><caption><p>Illustration for the connection part of screw-retained design. A change in the inclination of the vertical axis could cause the change in the magnitude of horizontal force.</p></caption><graphic xlink:href="jap-5-312-g005"></graphic></fig><table-wrap id="T1" orientation="portrait" position="float"><label>Table 1</label><caption><p>Abbreviations for different groups investigated</p></caption><graphic xlink:href="jap-5-312-i001"></graphic></table-wrap><table-wrap id="T2" orientation="portrait" position="float"><label>Table 2</label><caption><p>Absolute strain values (µm/m) at the different strain gauge locations</p></caption><graphic xlink:href="jap-5-312-i002"></graphic></table-wrap><table-wrap id="T3" orientation="portrait" position="float"><label>Table 3</label><caption><p>Mean strain values (µm/m) at each strain gauge location</p></caption><graphic xlink:href="jap-5-312-i003"></graphic></table-wrap><table-wrap id="T4" orientation="portrait" position="float"><label>Table 4</label><caption><p><italic>P</italic> values from repeated measures 2 factor analysis (α=.05)</p></caption><graphic xlink:href="jap-5-312-i004"></graphic><table-wrap-foot><fn><p><sup>*</sup>: significant at <italic>P</italic><.05</p></fn></table-wrap-foot></table-wrap></floats-group></pmc></record>Pour manipuler ce document sous Unix (Dilib)
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